Surface integrity of aisi h13 tool steel in end milling process

Jaharah A.G. , and Choudhury, I.A., and Masjuki H.H., and Che Hassan C.H., (2009) Surface integrity of aisi h13 tool steel in end milling process. International Journal of Mechanical and Materials Engineering, 4 (1). pp. 88-92. ISSN 1823-0334

Affiliations

Universiti Kebangsaan Malaysia, Faculty of Engineering, Dept. of Mechanical & Material Engineering
University of Malaya, Faculty of Engineering, Dept. of Design and Manufacture
University of Malaya, Faculty of Engineering, Dept. of Mechanical Engineering
Universiti Kebangsaan Malaysia, Faculty of Engineering, Dept. of Mechanical & Material Engineering

Abstract

This paper presents the detailed investigation of surface integrity when end milling AISI H13 tool steels using P10 TiN coated carbide and P20 uncoated cermets tools. The machining parameters studied were cutting speed (224 m/min – 355 m/min), feed rate (0.1 mm/tooth – 0.25 mm/tooth) and depth of cut (0.3 mm-0.8 mm). The detailed microstructure analysis shows that worn out tools caused over heated of the machined surface and changed the microstructure of the work material. That change increased the hardness of the work material’s machined surface, which is very hard and brittle, and generally referred as a white layer. The width formation of microstructure changes, increased with the increase in wear land and feed rate. A maximum of 550 HV was measured directly underneath the generated surface, i.e. 30% more as compared to the hardness of the basic material. This information is useful for the die and mould maker to select the best cutting condition to avoid such increase in hardness.

Item Type:

Journal

Keywords:

Surface integrity, AISI H13 tool steel, Carbide tools, End milling

Subjects:

T Technology, Engineering

ID Code:

10346